Pukaki (IMAGE) Columbia Climate School Caption Aerial view of glacial moraine (parallel lines of hills) surrounding Lake Pukaki in southern New Zealand sampled by the researchers that mark the advance of the Tasman glacier (upper left). Credit George Denton Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.